I downloaded Sunlit Tides Deluxe Edition from the games4theworld's Mediafire thing, and the world looks great, but it seems like I don't have the massage table, or the Serenity Retreat for that matter. I went to 'Edit Town' to look for it, but the lot is not there. What happened?

That's The Sims I'm afraid. I think there's a way to install a lot some other way.After looking it up I see that even people with legit games who bought the Sunlit Tides deluxe edition have problems finding the lot. It does turn out that the lot is named "community lot" in the community lots bin, not serenity retreat or anything like that. See if you can find it by looking for "community lot". It may also be called "6". Don't ask.... lol.If it's still not there, there may be a work around.

EDIT: So I've realized that I haven't uninstalled everything that has to do with Sunlit Tides. So I tried uninstalling all of those objects and items, but it keeps on saying "Error: cannot uninstall package with dependents".

I remember having some issues with the Sauna also...as in I wanted to place it in a lot I was working on but it wouldn't. I researched some info here at G4TW and found that something had to be decrapified lol, Trust in the Admin, they WILL get it figured out with you!

However, Is Sunlit Tides the pack that had the Ice Cream Machine and Deep Fryer? If so...I have the expansion pack...and everythings working..but those 2 objects aren't showing up in game. So just be patient...don't throw the compy out the window!

You could uninstall it manually, after uninstalling with the launcher, delete the caches in the The Sims 3 folder, delete the "Sunlit Tides" caches in WorldCaches and look for any mention of Sunlit Tides in the InstalledWorlds folder. All of these are in Documents\Electronic Arts\The Sims 3.

OK, I deleted the caches, but I still can't delete the objects that came with Sunlit Tides because of some stupid dependents, nor can I reinstall the world since the launcher says that it's already installed, which of course is false because I uninstalled the darn world.

Not only don't I have the serenity retreat, but now I don't have Sunlit Tides, just the objects. Maybe I should just give up....

Try to install just Sunlit Tides with a clean TS3 folder. Go to Documents\Electronic Arts and backup and remove the The Sims 3 folder. Now double click the Sunlit Tides sims3pack to install it, and start the game and see if it works.